Matthew DeBord/BI The 2019 Chevy Colorado ZR2 Bison is the hardest of hardcore offroading pickups from the bowtie brand. The Chevy Colorado ZR2 Bison has about $6,000 of upgrades from American Expedition Vehicles, all designed to improve the pickup’s ability to go where no midsize pickup has gone before. The offroading extras are probably too […]